Pump jack



' G. ALDERSONZ PUMP JACK.-

I APPLICATION man APR. 3 1922. 1,%36,%

Patented Nov. 21,- 1922'.

2 SHEETS-SHEET 1.

ATTORNEY G. ALDERSON.

PUMP JACK.

APPLICATION FILED APR-3,1922.

Patented Nov. 21, 11922..

2 SHEETS-SHEET 2.

in: ma.

NT l 2) I A TTORNEY Patented Nov. 211, 1922.

UNHTED STATES GEORGE ALDERSOlT, 016 LA SALLE, ILLINOIS.

PUMP

Application filed April 3,

To all whom it may concern:

Be it known that I, GEORGE ALnnRsoN, a citizen of the United States,residing in the city of La Salle, county of La Salle, and State ofIllinois, have invented certain new and useful Improvements in PumpJacks, of which the following is a specification.

My invention relates to improvements in pump jacks and has for itsobject the proc notion of a pump jack, the construction of which is verysimple and inexpensive, in which the parts are made up in such a mannerand of such material so that practically no machinist labor is requiredon the parts. The parts are made up so that they are reversible andinterchangeable, so that it can be readily assembled and will requireonly one pattern to be made for each two parts and does away with allkeys and keyseats.

I accomplish these objects by the means shown in the accompanyingdrawings, in which Fig. 1 is a side view of my invention, mounted readyfor operation.

Fig. 2 is a partial sectional view along a line AB of Fig. 1.

Fig. 3 is a similar partial sectional view of a modification of my pumpj ack.

Similar numerals represent similar parts throughout the several views.

In the drawings, 1 represents the pump on which my jack is mounted bymeans of outer clamping pieces 2 and bolts 3 which pass throughapertures in 2 and apertures in the frame pieces 4:. Frame pieces 4:comprise two pieces made up exactly the same so that they both can becast from one pattern, so that by reversing one of the frame pieces andbolting it together by means of a bolt 6 and using a cylindrical tube 8around said bolt as a spreader and projection 9 from each of said frames4: and bolts 10 passing through. projection 9, a complete frame is madeup to retain the mechanism required. Journaled on tube 8 is a belt wheel11, which has a pinion 12 on either side which meshes with an internalgear 13, which is ournaled on a tube 7, which is clamped in frames t bymeans of a bolt 14. A bolt 5 passing through the tube 7 holds the cappieces 15 on the ends of the tube 7 and retains the internal gears 13 inposition. Fastened on each gear 13, by means of a bolt 16 passingthrough the aperture and cylindrical depression shown on gear 13 is atube 17 which JACK.

1922. Serial no. 549,163.

carries the pitman 18, which is retained in position by means of thecollar 19, which is also held by the bolt 16. 20 is an additionalaperture for changing the stroke of my pump jack. The tubes 17 8 and 7are preferably pieces of seamless drawn tubing, which are uniformlysmooth and do not require any machine work on the surfaces and the partsof the pinions and internal gears by means of which they are journaledon said tubes as well as all other apertures are cast with suitablesmooth cores so that no machine work of any kind is required on theparts of my invention.

In the modification of my invention shown in Fig. 3, an additionalreduction gear 21 is shown in position, so as to give a still morepowerful pump jack by using the same kind of construction.

From the above description it will be seen that my construction requiresa minimum of patterns and no machine work at any point and theconstruction is so simple that it can be readily assembled by one havingvery little mechanical skill and at the same time is very inexpensiveand a very substantial mechanism.

It will be understood, of course, that while l. have here shown one formof my invention, I do not wish to limit myself to the exact form shown,but desire to have it taken in a sense illustrative of any and all theforms that come fairly within the scope of the appended claims.

I claim 1. In a pump ack, two similarly formed frames, a plurality ofcylindrical members clamped between said frames with means for fasteningsaid cylindrical member and said frames together, a pinion and aninternal gear journaled on said cylindrical members and means on saidinternal gear and said frames which co-act with a pump to operate same.

2. In a pump jack, two similarly formed frames, a plurality'ofcylindrical members clamped between said frames, with means forfastening said cylindrical members and frames together, a pinionjournaled on one of said cylindrical members, an internal gear journaledon another of said cylindrical members which meshes with said pinion andmeans on said internal gear for operating a pump rod.

3. in a pump jack, a pump, a pump rod, two similarly formed frames, aplurality of cylindrical members clamped between said frames With meansfor fastening said cylindrical members and frames together and to thepump, a pinion journaled on one of said cylindrical members, an internalgear journaled on another of said cylindrical mem bers which meshes withsaid pinion, a pin mounted on said internal gear and means journaled onsaid pin and connecting said puma rod.

' 4. 111 a pump jack, a pump, a pump rod, two similarly formed frames, aplurality of cylindrical members clamped between said frames, with meansfor fastening said cylindrical members and said frames'k'ogether, meansfor fastening said frames to said pump, a pinion journaled on one ofsaid cylindrical members, an internal gear journaled on another of saidcylindrical members which meshes with. said pinion, a cylindrical memberfastened to said internal gear and a rod journaled on said member andconnecting the pump rod, GEORGE ALDERSO-N.

